Refuse-destructor or other furnace.



J. H. THWAITES & J. T. CRAVEN.

REFUSE DESTRUCTOR OR OTHER FURNACE.

APPLICATION FILED ]AN.1I. 1913.

Patented Apr. 13, 1915.

4 SHEETS-SHEET 1.

NEW.

THE NORRIS PETERS CO, PHOm-LITHQ, WASHINGTUN, D. C.

l. H. THWAITES & J. T. CRAVEN.

REFUSE DESTRUCTOR OR-OTHER FURNACE.

APPLICATION HLED IAN. n, 1913.

Patented Apr. 13, 1915.

4 SHEETSSHEET 2.

Masses. five/550111 4%20651/ fi med. J /Mm/w 1. H. THWAITES & 1.1. CRAVEN.

REFUSE DESTRUCTOR OR OTHER FURNACE.

APPLICATION FILED JAN. 11. 1913.

' Patented Apr. 13, 1915.

4 SHEETS-SHEET 3.

THE NORRIS FETERS CO.l FHOTO-LITHll, WASHINGTON. D C.

J. H. THWAITES & J. T. CRAVEN.

REFUSE DESTRUCTOR 0R OTHERFURNACE. APPLICATION FILED IAN. H, 1913.

Patented Apr. 13, 1915.

4 SHEETS-SHEET 4.

THE NORRIS PETERS CO. PHOTO-LITHQ, WASHINGTON. D C

JOHN HUBERT THWAITES, OF IBEDFORD, AND JAMES TETLEY CRAVEN, 0F BBIXTON,

' ENGLAND.

REFUSE-DESTBUCTOR OR OTHER FURNACE.

manner.

Application filed January 11, 1913.

To all whom it may concern:

Be it known that we, JOHN HUBERT 'li-iwAITEs, a subject of the King of Great Britain, residing at 126 Bromham road, Bedford, in the county of Bedford, England, and Jaime TETLEY CRAVEN, a sub ect of the King of Great Britain, residing at 26 Felsberg road, Brixton, in the county of London, England, have invented new and useful Improvements in Refuse-Destructor or other Furnaces, of which the following is a specification.

@ur invention relates more particularly to furnaces of refuse destructors but is applicable to other furnaces.

Uwing to the nature of the material consumed on the grates of destructor furnaces very large quantities of clinker are deposited on the firebars and the manual labor necessary for clinkering such furnaces is considerable and very exhausting to the firemen.

Our invention is designed to provide means whereby the firebars of furnace grates can be clinkered automatically merely by the turning of the firebars forming the grate.

According to our invention we arrange in the furnace pivotally mounted series or sets of firebars with curved or are shaped supporting surfaces of such radii that said sets of firebars can be moved on their pivots when desired to such positions that the extremities of each set can be moved over the supporting surface of an adjacent set of firebars and remove the clinker therefrom. In this manner the working or supporting surfaces of each set of firebars are clinkered in turn and the clinker deposited in the ashpit through spaces which are opened between the sets of firebars during the operation.

@ur invention is illustrated by way of example in the accompanying drawings in which Figure 1 shows a transverse section through a furnace fitted with the pivotally mounted firebars of our invention. Fig. 1 is a similar transverse section showing in dotted lines a pinion and worm-gear operating mechanism of the form shown in detail in Figs. 8 and 9. Fig. 2 shows a sectional view on the line A-B of Fig. 1. Figs. 3 and 4: show diagrammatic views showing intermediate positions of the piv-- Specification of Letters Patent.

Patented Apr. 113, 1915.

Serial No. 741,540.

otally mounted firebars during the clinkering operation. Figs. 5 and 6 show alternative forms of our invention. Fig. 7 is a front elevation of an arrangement of worm gearing which may be employed to rotate the grate bars; Fig. 8 is an enlarged sectional view of the same; and Fig. 9 is a central vertical section of the gearing.

Referring now to the drawings we illustrate by way of example a furnace grate in which three sets of firebars are mounted, each set of bars are joined by one or more connecting rods and mounted on a common pivot. When desired each set of firebars can be turned on its pivot to form a clinkering member adapted to engage and clinker the working or supporting surfaces of the adjacent set of firebars.

The sets of firebars forming the side members 1 and 2 are pivoted at their lower ends on pivots 3 and 4: and are provided with supporting surfaces 5 in the form of single arcs of the desired radius. lhe set of firebars forming the central member 6 is pivoted on the pivot 7 arranged at a convenient distance above said pivots 3 and 4: of the side members 1 and 2 and is provided with outwardly extending supporting surfaces 8 and 9, on either side of its pivot each curved to the same radius as that of the supporting surfaces 5 of said side members 1 and 2. As illustrated more particularly in Fig. 1 said supporting members 1, 2 and 6 when at rest form a furnace grate with two curved surfaces divided by a central arch.

hen it is desired to clinker the firebars one or both the side members can be moved inwardly on their pivots through a quarter of a circle, while the central member 6 can be rotated on its pivot to the position shown in Fig. 4, said members opening during their movement spaces through which the clinker can pass to the ashpit. hen in the position shown in Fig. 4 the extremities of the members 1 and 2 can be moved in turn over the supporting surfaces 8 and 9 of the central member 6, whiie in the rotation of the central member 6 to the position shown in Fig. 41- the extremities of said central member are moved in turn over the curved supporting surfaces 5 of the side members 1 and 2 when the latter are turned immrdly approximately through a quarter of a circle as illustrated in the position of the side member 1 in Fig. 3. The pivots 3, 4: and 7 on which are the said clinkering members 1, 2 and 6 are conveniently rotated by suitable earing, such as worm gearing. adapted to move said members to the desired positions to allow of each of the supporting surfaces of the grate being clinkered in the desired sequence by the extremities of the adjacent clinkering members.

In Figs. 7, 8 and 9, we have illustrated one arrangement of gearing which may be employed to rotate the grate bars. The middle shaft 7, carries a gear 1%, and upon the ends of the shafts 3 and 1 are mounted toothed segments 15 and 15. An operating shaft 16, carries a miter gear 18, which meshes with a gear 19, carried by the sleeve 20, which is provided with a worm 21, meshing with the gear 14. A gear 22, carried by the sleeve 23, surrounding the shaft 16, meshes with gears 25 and 25 upon the shafts 27, 27, which are provided with worms 28, 2S meshing with the segments 15 and 15. The outer ends of the shafts 3, a: and '7 are provided with notched disks 29, which may be locked in any desired position by means of the keys 30, carried upon the locking-shaft 31, and which may be rocked by means of a lever 32. When it is desired to rotate only the middle set of bars the operating lever 34,.is slid into the position indicated in dotted lines in Fig. 9. Upon turning the handle 34, the shaft 16, and the gear 18 will be rotated, thereby rotating the grate-bar shaft 7, through the gear 19, worm 2 and gear '14:. lVhen it is desired to swing the side bars, the lever 31'- is slid into the position indicated in whole lines in Fig. 9, there- 'by causing the boss 3%, to embrace the squared end 23 of the sleeve 23. Then upon turning the handle 34, the sleeve 23 and gear 22, will be rotated, and through the gears 25, 25, worms 28, 28 and segments 15, 15, causeuthe grate-bar shafts3 and 4 to rotate. I

In combination with the clinkering firebars of our invention, we prefer to arrange buckets 10 preferably mounted on wheels and adapted to be moved into the ashpit to a position beneath said firebars in order to receive the clinker deposited through the spaces opened between said firebars during the clinkering operation. Beneath the central member 6 we arrange a break bar 11 as shown in Figs. 1 and 2 the break bar 11 is adapted to break the clinker deposited from the central member and to guide it into the buckets 10.

Although we have described the arrangement of three sets of members as the most satisfactory way of carrying out our invention at present known to us it must be understood that we are not limited to this arrangement of the members. If desired we may arrangethe firebars as shown in Fig. 5

in two centrally pivoted sets of firebars with are shaped supporting surfaces 11 each set being arranged in such relation to the o ther as to be capable of being moved from the position of rest illustrated so as to engage and pass over the supporting surfaces 11 of the opposite set of firebars in the manner described. In Fig. 6 we show another form of our invention in which two sets of firebars 12 are respectively pivoted at the sides of the furnace and each set is arranged in such relation to the other as to be capable of being moved so as to engage and pass over the supporting surface of the opposite set of firebars. Again, it may be found desirable to arrange more than three pivoted sets of firebars with are shaped surfaces working in the manner above described.

What we claim is 1. A furnace comprising sets of pivoted fire-bars constituting a grate, the ends of one set of bars being movable across the working or supporting surfaces of the bars of the adjacent set to serve as clinkering members therefor.

2. In a furnace the combination of pivoted firebars with curved fuel supporting surfaces constituting a grate and a pivoted clinkering member movable concentrically over the curved supporting surfaces of said fire-bars.

3. A furnace comprising sets of fire-bars constituting a grate, and means for causing the sets of bars to successively clinker the top fuel supporting surfaces of adjacent sets of said bars.

4. A furnace having a grate comprising sets of pivoted fire-bars having curved fuel supporting surfaces, the ends of one set of bars being movable across the supporting surfaces of the bars of the adjacent set to serve as clinkering members therefor.

' 5. In a furnace the combination of sets of firebars with curved fuel supporting surfaces pivotally mounted upon supports arranged in such positions that the extremities of each set can be moved across the supporting surface of an adjacent set of firebars to remove the clinker therefrom.

' 6. In combination with a furnace structure two sets of firebars with curved fuel supporting surfaces pivotally mounted on the sides of the furnace, a central set of firebars with curved supporting surfaces pivotally mounted in the center of the furnace, the free extremities of each set of bars constituting clinkering members when moved upon their pivots and thereby caused to pass across the curved supporting surfaces of the adjacent sets of fire-bars to remove the clinkers therefrom.

7(In combination with a furnace structure two sets of firebars with curved supporting surfaces pivotally mounted in the same horizontal plane on the sides of the furnace, a central set of firebars with curved supporting surfaces pivotally mounted in the center of the furnace above the pivots of said side sets of firebars and adapted to be rotated between said side sets of firebars, the free extremities of said firebars constituting clinkering members adapted to be passed across the curved supporting surfaces of the adjacent set of firebars to remove the clinker therefrom.

8. In combination with a furnace structure two sets of firebars with curved supporting surfaces pivotally mounted on the sides of the furnace in the same horizontal plane, a central set of firebars pivotally mounted in the center of the furnace above the pivots of said side sets of firebars and adapted to be rotated between said side sets of firebars, and having outwardly extending curved supporting surfaces on either side of the pivot, said surfaces being curved to the same radius as that of the curved supporting surfaces of said side sets of firebars, the free extremities of said firebars constituting clinkering members adapted to be passed across the curved supporting surfaces of the adjacent set of firebars to remove the clinker therefrom.

9. In combination with a furnace structure two sets of firebars with curved supporting surfaces pivotally mounted on the sides of the furnace, a central set of firebars with curved supporting surfaces pivotally mounted in the center of the furnace, the free extremities of said firebars constituting clinkering members adapted to be passed across the curved supporting surfaces of the adjacent set of firebars to remove the clinker therefrom and worm gearing adapted to move said set of firebars successively to the desired positions to allow each of the supporting surfaces of said firebars being clinkered in the desired sequence by the extremities of the adjacent set of firebars.

10. In combination with a furnace structure two sets of firebars with curved supporting surfaces pivotally mounted on the sides of the furnace in the same horizontal plane, a central set of firebars pivotally mounted in the center of the furnace above the pivots of said side sets of firebars and adapted to be rotated between said side sets of firebars, and having outwardly extending curved supporting surfaces on either side of the pivot, said surfaces being curved to the same radius as that of the curved supporting surfaces of said side sets of firebars, the free extremities of said firebars constituting clinkering members adapted to be passed across the curved supporting surfaces of the adjacent set of firebars to remove the clinker therefrom, and means adapted to move said sets of firebars successively to the desired positions to cause each of the supporting surfaces of said firebars being clinkered in the desired sequence by the extremities of the adjacent set of firebars.

In testimony whereof we have signed our names to the specification in the presence of two subscribed witnesses.

JOHN HUBERI THWAIIES. JAMES TETLEY CRAVEN.

Witnesses:

JOHN HENRY OWEN, FREDERICK WILLIAM JOHNSON.

Goplct of this patent may be obtained for five cents each, by addressing the Commissioner of Patents.

Washington, D. G. 

